DOC: added verbose param to smooth using nurbs
DOC: added verbose param to smooth using nurbs

Former-commit-id: ce5a79498660c7700cab6882eba6c1296dfac09d
Former-commit-id: f676efa7a98d81144629a45a322e249a18b3a939
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox